Re: [Sdl4fp-users] blitting outside screen area

[Matthias <ma...@gm...>]

Not too easy, because the whole process of sprite management is done by 
objects. But you helped me alot already. I tried the same thing with another 
sprite and then the parts blitted outside didn't get cut (don't know why I 
didn't try before; probably because I didn't know what to expect).

So, now I know it should have something to do with my code. If I figured out 
what exactly is causing this and it might be interesting for you I will post 
it. If it is caused by something like "oh damn, forgot to NEW the 
pointer..." I won't post.

So thanks alot Elio!

Greets,
Matthias


----- Original Message ----- 
From: "Elio Cuevas Gómez" <el...@mi...>
To: <sdl...@li...>
Sent: Sunday, April 23, 2006 2:09 AM
Subject: Re: [Sdl4fp-users] blitting outside screen area


Not sure why is this happening... Could you provide us with a code sample? I
have never seen this behavior before.

El Sáb 22 Abr 2006 10:49, Matthias escribió:
> Hi there.
>
> I have strange behaviour if I blit outside screen area. I used
> SDL_SETCLIPRECT to define the clipping area (the error described next
> occurs if I don't define clip area, too). The clip area is exactly the
> screen area (it returns TRUE).
>
> I noticed that if I clipped an image outside the area and later try to 
> blit
> it to the visible area the image won't be seen.
>
> Next I tried to clip an image (200 x 200) at a position (for example x=
> 200, y= -100) so it would be partially in visible area and other part
> outside screen area. Then, as expected, the partial part inside screen 
> area
> is shown. - But if I try to clip it to another part of the screen, so the
> whole image should be seen, only the partial part is seen.
>
> Most curious thing about this: I blitted the image, after the clipping 
> half
> outside the screen as described before, at position (0,0)... instead of an
> [200 x 200]-Image with the first part (200 x 100) cleared I just got the
> shown part at (0,0) so it seems as if the image got cut or shrinked by
> half. But if I check the value of width and height of image it stayed 200 
> x
> 200. I am really not sure how to explain this.
>
> Any hints how to let images be blitable after blitting them to outside
> area? What is the reason why it does not work as described?
>
> Thanks a lot!
>
> Greets,
> Matthias


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